My Raptor is a 2018 802a, early build date (Nov 2017), approximately 42K miles, replaced cam phasers in March 2020. No tunes, all stock. I rarely get on the gas in this truck, drive it pretty easy. About July 2020 , approximately 10-20 seconds after start-up, a clicking noise starts. I remote start usually, so I am outside the truck to hear it. It doesn't make the clicking noise every time, but does it often. Videos posted below (hopefully I uploaded correctly to YouTube). This noise seems different to me than the cam phaser rattle. It also seems to get louder when the fast idle kicks on, I think this is due to the A/C being on when I remote start. The truck has been at Max Ford in Harrisonville, MO for last 4 weeks. They can hear the problem on the videos, but say they cannot find any issues. It's been through several techs, a master tech and apparently was elevated to a Field Service Engineer. No codes thrown, no indications of problems. FYI, up until now I have no issues with the dealer, but recently they appear to have personnel issues and plenty of excuses for not solving this problem. This is where I bought the truck. Obviously, I am pissed that my truck has been sitting at a dealer for 4 weeks with no solution. I would appreciate anyone that can take a few minutes and listen to the videos, maybe offer some advice. Apologize for the stupid birds chirping the background, that's not my truck! 2nd video you hear it about 25 seconds after start.